Recovery of temperature records from slow-growing corals by fine scale sampling of skeletons
MetadataShow full item record
We used laser ablation inductively coupled plasma mass spectrometry (LA ICP-MS) to analyze Sr/Ca ratios in 5 colonies of the Atlantic corals, Diploria labyrinthiformis and Montastrea franski, each growing less than 5 mm yr−1. By targeting the centers of septa we avoided thickening deposits to achieve an analytical sampling resolution of 5-10 days. The sensitivity of Sr/Ca to temperature (−0.096 mmol/mol/°C) is ∼3 times higher than previously reported for these species and equivalent to that exhibited by fast-growing Porites corals from the Indo-Pacific. The Sr/Ca-sea surface temperature (SST) calibrations derived from these corals were not statistically different and were independent of colony growth rate over the period studied. Data from 4 D. labyrinthiformis colonies were pooled to produce a single Sr/Ca-SST calibration with a calculated standard error on the predicted ocean temperature of ±0.51°C. Applying our calibration to Sr/Ca analyses of D. labyrinthiformis skeleton deposited in the late 18th century indicated that average annual sea surface temperatures around Bermuda were ∼1°C cooler than today.
Author Posting. © American Geophysical Union, 2007. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 34 (2007): L17706, doi:10.1029/2007GL030967.
Suggested CitationGeophysical Research Letters 34 (2007): L17706
Showing items related by title, author, creator and subject.
Coral and algae cover, coral richness, and coral diversity from coral reef sites sampled by small boats in the Palauan archipelago from 2011-2013 Cohen, Anne L; de Putron, Samantha J.; Karnauskas, Kristopher; McCorkle, Daniel C; Tarrant, Ann M. (Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: firstname.lastname@example.org, 2019-12-30)Average coral and algae cover, coral richness, and coral diversity from 8 coral reef sites in Palau. For a complete list of measurements, refer to the full dataset description in the supplemental file 'Dataset_description.pdf'. ...
Weber, Laura; Gonzalez‐Díaz, Patricia; Armenteros, Maickel; Apprill, Amy (Wiley, 2019-05-21)Scleractinian corals are bathed in a sea of planktonic and particle‐associated microorganisms. The metabolic products of corals influence the growth and composition of microorganisms, but interactions between corals and ...
Coral biomineralization, climate proxies and the sensitivity of coral reefs to CO2-driven climate change DeCarlo, Thomas M. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2017-02)Scleractinian corals extract calcium (Ca2+) and carbonate (CO2−3) ions from seawater to construct their calcium carbonate (CaCO3) skeletons. Key to the coral biomineralization process is the active elevation of the CO2−3 ...